Thread-guide.



A. A. MERRITT. THREAD GUIDE. APPLIOATION FILBD JAN.12, 1910. RENBWED AUG. 1, 1912.

Patented 001;. 15, 1912.

LEE-41,65%

AR'I'HUR 1%.. MERRITT, OF WORCESTER, MASSACHUSETTS, ASSIGNR '-530 WILI'COX t GIBBS SEYVING MACHINE COMPANY, OF NE?? YORK, N. Y., A CORPORATION v01? NEW THBEAD-GUIDE,

Specificetion of Letters Patent.

Original application filed. December 12, 1908, Serial No. 1=87,1t53. Divided and. this application flled. January 12, 1910, Serial No. :'3-7,.o83. Renewed August 1, 1912. Serial .tleA 712,775.

io aZZ whom 'it may sensem;

Be it known that I, ARTHUR A. llflnnm'rr, of Worcester, Massachusetts, have invented a new and .useful Iinprorement. in Thread- (luides, which invention is full y set forth in the followingy specification,

This is a division of my application filed December 12th, 1908, Serial No. -itlll for improveinents'in sewing machines.

The resent invention which. relates to iinprovements in thread-guides, will be readily understood by reference to the illust-r'ation in the accoinpanying drawing of what lis at present regarded as the preferred cnibo'iliinent thereof.

ln said drawing7 Figure 1 is a view, partly in vertical section and partly in front elevation, of a part of the bridge portion of the frame-work of a sewing machine showing thread-guides of the present invention applied thereto; Fig. 2'is a sectional-view lthrough one of the thread-guideson line 2- 2 of Fig. 3; Fig. 3 is a Vertical section on line 8 3 of Fig. 1, also showlng parts inounted on the machine frame which parts are omitted in Fig. 1; and Fig. 4 is a (letail view of the thread-guiding hooks and plates. Fi s. 1 and 3 illustrate thethread-guide of this invention as applied to a sewingr 1na-` chine of the Character fully described and illustrated in the aforesaid original appli- Lcat-ion of which the present is a division. 651 is a part of the bridge portion of the frame-work of such a machine. Two rotary take-ups are shown; one for four needle-threads and a single cross-thread includes three circular flange-plates G88, 691

and 691i; the other, for four looper-threads includes two circular iiange-plates 800 and SOIL Fig. 3' shows a bracket or frame (350 vsecured to the upper surface o f bridge 651,' and supporting w a thread-guide 659 andp thread-tension dislrs 660. Thesingle crossthrea'l o passes inward through the eye of thread-guide 659, around the spindl of teno sion' disk 660' between said dislrs,` outward through -the eye ofsaid thread-grille G59, downward to a set of thread-guidin'g hool-:s

' 'of the present invention, over one ofthe rotary take-ups between the ilangc-plates G88 and (591 thereof, and thencc to another set of threadluiding heoks of the present invention. The b'rai'lrot G 'also supports a plate 057 having the'ethrough thread-passages (358, and a set of tliread-tension plates G53. T he four needle-threads a, only two of which show in Pig. 8, pass through the threadpassages 858, between the tension-plates. 653, to the upper set of thread-guiding hooks of the present invent-ion, over therotary take-up between the plates (391 and 694 thereof, and thence to the 'lower set of thread-guiding books of the present invention. The four looper-thrcads, not shown, after passing bctween suitable thrcad-tension disks, not shown, pass through an upper set of threadguiding books of the present inrention, also not shown, but similar to the lowerset of such thread-guiding books illustrated at the right in Fig. 1. Between these two sets of books the looper-threads' pass over .the'rotary take-up at the right in Fig. 1 between the iange plates 800 and 801 thereof.

It will sufiice to describe indetail one of the above-mentioned four sets of threadguiding hooks of the present invention, to Wit, that at, the left-hand side of Fig. 1, and

illustrated inore in detail in Figs. 2 and 4.

Of this series there are four ho'olrs 672, one for each of the needle-threads, andfa fifth 4hook (373 for the cross-thread. 'A plate 675 coperates with cross-thread hook 673. As clearly shown in Fig. 2, the point of each hoolr projects into a groove or'recess in the back of its coperating hook or-plate, sufficient clearance being allowed between the adjacent surfaces to permit a thread to be passed inward to a position beneath the hook without actually threading it through the eye formcd by the hook. The relationship of the point of the hook and its groove,

'however, prevents the thread from becoming disengagcd from the hook by movement in a reversc direction. A construction is thus provided which offers great facility in thrcading the machine, while at the same time effectually avoiding accidental displacement of the thread during the rapid operation of the mechanism. The series of hooks and plate are mounted in proper relationship by securing' their shanks (in anysuitable way, as by soldering) in parallel grooves or recesses in a block 676, which latter is in turn sccured to the bridge 651 of the framework by a screw 677, Fig. l.

The upper set of thread-guiding hooks (37151 in Fig. 3, ispsirnilar to the lower set described above in detail, except that the shanks of the series of hooks and plates, instead of being sccured in parallel grooves or recesses in a block (such as 676) are secured in any suitable manner, as for example by soldering, in notches or recesses in the under edge of the base-plate of bracket 650, the ends of the shanks being beveled off flush With the end surface of said base-plate.

g The upper and lower sets of thread-guiding hooks for the four looper-threads, one of which sets 686 is at the right in Fig. 1, each includes four hooks and a plate similar to hooks 672 and plate G75 herctofore described.

VVhat I claim is:

1. A thread-guide having a plurality of hooks, the point of one of said hooks projecting into a groove or recess in an adjacent hook, whereby thread may pass said book-'point When moved in one direction but Will bc caught by the hook-point when moved in the reverse direction, and means for supporting the parts in proper relationship.

2. A thread-guide having' a plurality of hooks, the point of each hook projecting into a longitudinal groove or recess in the back of an adjacent hook, and means for supporting the parts in proper relationship.

3. A thread-guide havin' a plurality of hooks, the point of each ofD one or more o`f the hooks projecting into a groove or recess in an adjacent hook, .with the point of said hook entering said groove to a depth beyond the surface of the hook at the sides of the groove, and means for supporting the parts in proper relationship.

4. A thread-guide having a plurality of hooks, the point of each of one or more of the hooksI projecting into a groove or reeess in an adjacent hook, With the point of said hook entcring said groove to a depth beyond the surface of the hook at the sides of the groove, but clear of the bottom Wall of the groove, and means for supporting the parts in proper relationship.

In testimony whereof I have signed this specification in the presence of two Subscribing witnesses.

ARTHUR A. MERRITT.

Witnesses H. A. W. HAYWARD, BURTON V. Monsn. 

